CN111075877A - Asymmetric oil pressure shock absorber for railway vehicle - Google Patents

Asymmetric oil pressure shock absorber for railway vehicle Download PDF

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Publication number
CN111075877A
CN111075877A CN201911409448.8A CN201911409448A CN111075877A CN 111075877 A CN111075877 A CN 111075877A CN 201911409448 A CN201911409448 A CN 201911409448A CN 111075877 A CN111075877 A CN 111075877A
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CN
China
Prior art keywords
damping
hole
piston
valve
oil
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911409448.8A
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Chinese (zh)
Inventor
莫焱森
吴旭
吴彤
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Zhuhai Yecheng Rail Transit Equipment Technology Co ltd
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Zhuhai Yecheng Rail Transit Equipment Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Zhuhai Yecheng Rail Transit Equipment Technology Co ltd filed Critical Zhuhai Yecheng Rail Transit Equipment Technology Co ltd
Priority to CN201911409448.8A priority Critical patent/CN111075877A/en
Publication of CN111075877A publication Critical patent/CN111075877A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
    • F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
    • F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3214—Constructional features of pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/3405—Throttling passages in or on piston body, e.g. slots
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/36—Special sealings, including sealings or guides for piston-rods
    • F16F9/362—Combination of sealing and guide arrangements for piston rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/38—Covers for protection or appearance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention relates to an asymmetric oil pressure shock absorber for a railway vehicle, which realizes independent design of tensile damping force and compressive damping force by arranging a tensile valve system and a compression valve system on a piston and a bottom valve respectively, realizes the complete separated adjustment of the tensile damping force and the compressive damping force, realizes the flexibility of shock absorber damping adjustment, can ensure that the compressive damping force is smaller than the tensile damping force, is used for certain specially designed railway vehicles, and ensures the stability of the damping performance of the shock absorber.

Description

Asymmetric oil pressure shock absorber for railway vehicle
Technical Field
The invention belongs to the technical field of oil pressure dampers for rail vehicles, and particularly relates to an asymmetric oil pressure damper for a rail vehicle.
Background
The oil pressure vibration absorber for the rail vehicle is used for reducing vehicle suspension vibration, ensuring that the rail vehicle safely and stably runs on a line, and improving the riding comfort of passengers. The existing oil pressure shock absorber used for the railway vehicle is generally a symmetrical shock absorber, namely the tensile damping force and the compression damping force of the oil pressure shock absorber are equal in magnitude; asymmetric shock absorbers, i.e. oil pressure shock absorbers whose tensile damping force and compression damping force have different requirements. With the rapid development of the high-speed rail technology in China, the speed of the rail vehicle is also continuously improved, the technical requirements on the shock absorber are also higher and higher, the damping adjustment difficulty of the shock absorber is larger and larger, the stability of the damping performance of the shock absorber is difficult to ensure, the requirements of the common rail vehicle can be met through the symmetrical shock absorber, but for some specially designed rail vehicles, the requirements of the common symmetrical shock absorber cannot be met.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an asymmetric oil pressure shock absorber for a railway vehicle, which realizes independent design of tensile damping force and compressive damping force by respectively arranging a tensile valve system and a compression valve system on a piston and a bottom valve, realizes the complete separated adjustment of the tensile damping force and the compressive damping force, realizes the flexibility of the damping adjustment of the shock absorber, can ensure that the compressive damping force is smaller than the tensile damping force, is used for the railway vehicle with certain special design, and ensures the stability of the damping performance of the shock absorber.
In order to solve at least one of the above technical problems, the technical solution adopted by the present invention is:
an asymmetric oleo damper for a rail vehicle, comprising: piston unit and bottom valve unit, the piston unit includes piston and tensile valve system, the piston is equipped with first water conservancy diversion through-hole and first damping through-hole, tensile valve system is used for producing tensile damping force, includes: the first one-way valve plate is pressed on the first one-way valve plate by the blocking cover, the first one-way valve plate is arranged at the upper end of the first flow guide through hole and used for opening and closing the first flow guide through hole, and the damping valve plate is arranged at the lower end of the first damping through hole and used for opening and closing the first damping through hole;
the base valve unit includes a compression valving for generating a compression damping force, and the compression damping force is less than the tension damping force.
Further, the piston unit further includes: the piston ring is sleeved on the outer wall of the piston, and the piston is fixed on the piston rod by the locking nut.
Furthermore, a groove is formed in the piston and located at the lower end of the first damping through hole, and the damping valve plate is sleeved with the groove.
Furthermore, the bottom valve unit further comprises a valve seat, the valve seat is provided with a second flow guide through hole and a second damping through hole, the compression valve system comprises a second spring, a second one-way valve block, an adjusting screw, a pre-tightening spring and a damping valve, two ends of the second spring are respectively abutted to a convex shoulder of the valve seat and the second one-way valve block, the second one-way valve block is arranged at the upper end of the second flow guide through hole and used for opening and closing the second flow guide through hole, the adjusting screw, the pre-tightening spring and the damping valve are sequentially arranged in the second damping through hole, a side wall of the damping valve is provided with an oil window, the oil window passes through the inner wall of the second damping through hole in a stretching state and is closed, and the oil window is opened with the inner wall of the second damping through hole in a staggering manner in a compression state.
Further, the valve seat includes: the bottom valve seat is provided with the second flow guide through hole, the core valve seat is detachably arranged on the bottom valve seat, and the core valve seat is provided with the convex shoulder and the second damping through hole.
Further, the method also comprises the following steps: piston rod unit, outer jar unit, interior jar and direction lid unit, wherein, the piston rod unit include the piston rod, outer jar unit includes: outer jar and outer jar nut, the direction lid unit includes: dust ring, O type circle, skeleton oil blanket and direction lid, the direction lid with the tip of outer jar passes through outer jar nut is connected, is equipped with at this junction O type circle, the piston rod cover is located in the middle part through-hole of direction lid the piston rod with be equipped with between the middle part through-hole of direction lid the skeleton oil blanket outer jar nut with be equipped with between the piston rod the dust ring.
Furthermore, an oil return channel is arranged on the guide cover and is communicated with an oil storage cavity formed by the outer cylinder and the inner cylinder.
Further, the method also comprises the following steps: and the air bag is arranged in the oil storage cavity.
The beneficial effects of the invention at least comprise: the asymmetric oil pressure shock absorber realizes independent design of tensile damping force and compressive damping force by arranging the tensile valve system and the compression valve system on the piston and the bottom valve respectively, so that the compressive damping force can be smaller than the tensile damping force, the asymmetric oil pressure shock absorber can be used for some specially designed railway vehicles, the tensile damping and the compressive damping are not influenced mutually, and the stability of the damping performance of the shock absorber is ensured.
Drawings
FIG. 1 is a schematic view of the damper of the present invention.
Fig. 2 is a schematic structural view of the piston unit of the present invention.
Fig. 3 is a schematic structural view of a base valve unit according to the present invention.
Fig. 4 is a schematic drawing of the extension movement of the shock absorber of the present invention.
Figure 5 is a schematic view of the compression movement of the shock absorber of the present invention.
The device comprises a piston rod unit 1, a piston rod 101, a dustproof ring 2, an outer cylinder nut 3, an O-shaped ring 4, a framework oil seal 5 and a guide cover 6, wherein the piston rod unit is connected with the piston rod unit through a connecting rod;
the piston unit 7, a piston 701, a first flow guide through hole 702, a first damping through hole 703, a first one-way valve plate 704, a first spring 705, a blocking cover 706, a damping valve plate 707, a piston ring 708 and a locking nut 709;
hydraulic oil 8, an air bag 9 and an inner cylinder 10;
the hydraulic control valve comprises a bottom valve unit 11, a bottom valve seat 110, a second flow guide through hole 111, a core valve seat 112, a shoulder 113, a second damping through hole 114, a second spring 115, a second check valve plate 116, an adjusting screw 117, a pre-tightening spring 118, a damping valve 119 and an oil window 120;
outer cylinder 12, rubber bushing 13.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to specific examples. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
Example 1: fig. 1 is a schematic structural view of a shock absorber of the present invention, and referring to fig. 1, the asymmetric oil pressure shock absorber of the present invention mainly includes: the air bag type hydraulic cylinder comprises a piston rod unit, an outer cylinder unit, a guide cover unit, an inner cylinder, an air bag, a rubber bushing, a piston unit and a bottom valve unit.
Wherein the piston rod unit includes the piston rod, and the outer cylinder unit includes: outer jar and outer jar nut.
The guide cover unit includes: the oil seal structure comprises a dustproof ring, an O-shaped ring, a framework oil seal and a guide cover, wherein the guide cover is connected with the end part of the outer cylinder through an outer cylinder nut, the O-shaped ring is arranged at the joint for sealing, so that oil is prevented from flowing out from the matching space between the guide cover and the outer cylinder, the internal structure of the shock absorber is locked through the outer cylinder nut, and the O-shaped ring is pressed; the piston rod is sleeved in the middle through hole of the guide cover, and the guide cover is used as a supporting structure and can provide a guide effect for the piston rod; the framework oil seal is arranged between the piston rod and the middle through hole of the guide cover and used for sealing the piston rod, and the dustproof ring is arranged between the outer cylinder nut and the piston rod and used for preventing foreign matters from entering the interior of the shock absorber.
In the embodiment, the guide cover is provided with an oil return channel which is communicated with an oil storage cavity formed by the outer cylinder and the inner cylinder, and the air bag is arranged in the oil storage cavity and is used for compensating the volume change of the piston rod which enters or is drawn out of the shock absorber; and the two ends of the outer cylinder unit and the piston rod unit are respectively provided with the rubber bushing for flexible connection with the vehicle body.
Fig. 2 is a schematic structural diagram of a piston unit according to the present invention, and referring to fig. 2, the piston unit according to the present invention includes a piston and a stretching valve system, the piston is provided with a first flow guiding through hole and a first damping through hole, and the stretching valve system is used for generating a stretching damping force, and includes: the first check valve plate is pressed on by the blocking cover, the first check valve plate is arranged at the upper end of the first flow guide through hole, when the piston is in a stretching state, oil in the upper cavity of the piston presses the first check valve plate to close the first flow guide through hole, and when the piston is in a compressing state, the oil in the lower cavity of the piston pushes the first check valve plate through the first flow guide through hole; the damping valve plate is arranged at the lower end of the first damping through hole, oil in the upper cavity of the piston jacks the damping valve plate through the first damping through hole in a stretching state, and the oil in the lower cavity of the piston compresses the damping valve plate to close the first damping through hole in a compressing state.
It is to be understood that fig. 2 of the present invention shows only a part of the first flow guiding through holes and the first damping through holes, and the specific number of the arrangement thereof is not particularly limited.
In this embodiment of the present invention, the piston unit further includes: the piston ring is sleeved on the outer wall of the piston, and the piston is fixed on the piston rod by the locking nut.
In this embodiment of the present invention, the piston located at the lower end of the first damping through hole is provided with a groove for sleeving the damping valve plate, so that the damping valve plate is directly abutted against the lower end of the first damping through hole.
In the embodiment of the invention, the first spring is a tower-shaped spring and has smaller pretightening force when being arranged, the damping valve plate is directly pressed at the lower end of the first damping through hole, the pretightening force of the spring is smaller than the damping force of the damping valve plate, namely, the first flow guide through hole can be easily opened under small oil pressure, and the first damping through hole can be opened under large oil pressure, namely, larger stretching damping is generated.
Fig. 3 is a schematic structural diagram of a base valve unit according to the present invention, and referring to fig. 3, the base valve unit according to the present invention includes a valve seat and a compression valve train, wherein the compression valve train is used for generating a compression damping force, and the compression damping force can be made smaller than the tension damping force by adjustment.
More specifically: the disk seat is equipped with second water conservancy diversion through-hole and second damping through-hole, the compression valve system includes second spring, second check valve piece, adjusting screw, pretension spring and damping valve, the both ends of second spring respectively with the convex shoulder of disk seat with second check valve piece butt, second check valve piece set up in the upper end of second water conservancy diversion through-hole for the switching second water conservancy diversion through-hole be equipped with in proper order in the second damping through-hole adjusting screw, pretension spring and damping valve, more specifically: two ends of the pre-tightening spring are respectively abutted to the damping valve and the adjusting screw, and the compression damping force of the damping valve can be adjusted by screwing the adjusting screw.
The side wall of the damping valve is provided with an oil window, the oil window is closed through the inner wall of the second damping through hole in a stretching state, and the oil window and the inner wall of the second damping through hole are opened in a staggered mode to generate a compression damping force in a compression state.
It is to be understood that fig. 3 of the present invention shows only a part of the second flow guiding through holes and the second damping through holes, and the specific number of the arrangement thereof is not particularly limited.
In this embodiment of the invention, the second spring is a tower spring, which has a low pre-load force when set.
In this embodiment of the present invention, as shown in fig. 3, the valve seat includes: the bottom valve seat is provided with the second flow guide through hole, the core valve seat is detachably arranged on the bottom valve seat, and the core valve seat is provided with the convex shoulder and the second damping through hole.
Fig. 4 is a schematic drawing of the stretching movement of the shock absorber of the present invention, as shown in fig. 4, when the shock absorber is stretching (in the direction shown by the arrow in the drawing), the first check valve plate on the piston is closed, the damping valve plate is opened by the pressure generated by the oil, the stretching damping force is generated by the oil flowing from the upper chamber of the piston to the lower chamber of the piston, and the second check valve plate on the bottom valve is opened, the oil flows into the inner cylinder from the outside of the inner cylinder to compensate the volume change caused by the outward movement of the piston rod, because the pre-tightening force of the tower spring is small, the damping force generated in the process can;
FIG. 5 is a schematic view of the compression movement of the shock absorber of the present invention, as shown in FIG. 5, when the shock absorber performs the compression movement (in the direction shown by the arrow in the figure), the first check valve plate on the piston is opened, and a part of oil flows from the lower piston chamber to the upper piston chamber through the check valve plate, and the damping force generated in this process is negligible due to the small pre-tightening force of the tower-shaped spring; meanwhile, the second one-way valve plate on the bottom valve is closed, part of oil flows out of the inner cylinder through an oil window of the damping valve on the bottom valve to compensate the volume change of the piston rod entering the inner cylinder and generate compression damping force, and the oil path is shown in figures III and IV.
It can be understood that the tensile damping force can be larger than the compressive damping force by changing the number of the damping valve plates on the piston or adjusting the adjusting screws on the base valve.
In summary, the asymmetric oil pressure shock absorber provided by the invention realizes independent design of the tensile damping force and the compressive damping force by arranging the tensile valve system and the compression valve system on the piston and the bottom valve respectively, so that the compressive damping force can be smaller than the tensile damping force, the asymmetric oil pressure shock absorber can be used for some specially designed railway vehicles, the tensile damping and the compressive damping are not influenced by each other, and the stability of the damping performance of the shock absorber is ensured.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it is understood that the embodiments are illustrative and not restrictive, that various changes, modifications, substitutions and alterations may be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. An asymmetric oleo damper for a rail vehicle, comprising: piston unit and bottom valve unit, its characterized in that, the piston unit includes piston and tensile valve system, the piston is equipped with first water conservancy diversion through-hole and first damping through-hole, tensile valve system is used for producing tensile damping force, includes: the first one-way valve plate is pressed on the first one-way valve plate by the blocking cover, the first one-way valve plate is arranged at the upper end of the first flow guide through hole and used for opening and closing the first flow guide through hole, and the damping valve plate is arranged at the lower end of the first damping through hole and used for opening and closing the first damping through hole;
the base valve unit includes a compression valving for generating a compression damping force, and the compression damping force is less than the tension damping force.
2. The asymmetric oleo damper for a railway vehicle of claim 1, wherein the piston unit further comprises: the piston ring is sleeved on the outer wall of the piston, and the piston is fixed on the piston rod by the locking nut.
3. The asymmetric oil pressure damper for the railway vehicle as claimed in claim 1, wherein the piston at the lower end of the first damping through hole is provided with a groove for sleeving the damping valve plate.
4. The asymmetric oil pressure damper for a railway vehicle as claimed in claim 1, the bottom valve unit also comprises a valve seat, the valve seat is provided with a second flow guide through hole and a second damping through hole, the compression valve system comprises a second spring, a second one-way valve plate, an adjusting screw, a pre-tightening spring and a damping valve, two ends of the second spring are respectively abutted with the convex shoulder of the valve seat and the second one-way valve plate, the second one-way valve plate is arranged at the upper end of the second flow guide through hole and is used for opening and closing the second flow guide through hole, the adjusting screw, the pre-tightening spring and the damping valve are sequentially arranged in the second damping through hole, an oil window is arranged on the side wall of the damping valve, and when the damping valve is in a stretching state, the oil window is closed through the inner wall of the second damping through hole, and in a compression state, the oil window and the inner wall of the second damping through hole are opened in a staggered mode.
5. The asymmetric oleo damper for railway vehicles according to claim 4, characterized in that said valve seat comprises: the bottom valve seat is provided with the second flow guide through hole, the core valve seat is detachably arranged on the bottom valve seat, and the core valve seat is provided with the convex shoulder and the second damping through hole.
6. The asymmetric oleo damper for a rail vehicle of claim 2, further comprising: piston rod unit, outer jar unit, interior jar and direction lid unit, wherein, the piston rod unit include the piston rod, outer jar unit includes: outer jar and outer jar nut, the direction lid unit includes: dust ring, O type circle, skeleton oil blanket and direction lid, the direction lid with the tip of outer jar passes through outer jar nut is connected, is equipped with at this junction O type circle, the piston rod cover is located in the middle part through-hole of direction lid the piston rod with be equipped with between the middle part through-hole of direction lid the skeleton oil blanket outer jar nut with be equipped with between the piston rod the dust ring.
7. The asymmetric oil pressure damper for a railway vehicle as claimed in claim 6, wherein the guide cover is provided with an oil return passage communicating with an oil storage chamber formed by the outer cylinder and the inner cylinder.
8. The asymmetric oleo damper for a rail vehicle of claim 7, further comprising: and the air bag is arranged in the oil storage cavity.
CN201911409448.8A 2019-12-31 2019-12-31 Asymmetric oil pressure shock absorber for railway vehicle Pending CN111075877A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911409448.8A CN111075877A (en) 2019-12-31 2019-12-31 Asymmetric oil pressure shock absorber for railway vehicle

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Application Number Priority Date Filing Date Title
CN201911409448.8A CN111075877A (en) 2019-12-31 2019-12-31 Asymmetric oil pressure shock absorber for railway vehicle

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Publication Number Publication Date
CN111075877A true CN111075877A (en) 2020-04-28

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112727982A (en) * 2020-12-31 2021-04-30 珠海市业成轨道交通设备科技有限公司 Oil pressure shock absorber and high-speed motor train unit applying same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112727982A (en) * 2020-12-31 2021-04-30 珠海市业成轨道交通设备科技有限公司 Oil pressure shock absorber and high-speed motor train unit applying same

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